Stove.



W. F. STARK.

STOVE.

' APPLICATION FILED JAN.17, 1914.

Patented Feb. 23, 1915.

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- Att orneys THE NORRIS PETERS ca. FHOTC-LITHQ, WASHINGTON. D. Q

f M wa Fir t WILLIAM F. STARK, or Rooiiv' FORD. COLORADO.

STOVE.

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To all whom it may concern:

. Be it known that I, WILLIAM F. STARK, a citizen of the United States, residing at Rocky Ford, in the county of Otero and State of Colorado, have invented a new and useful Stove, of which the following is a specification.

Y The present invention relates to improve ments in stoves, one object of the invention, being the provision of a grate especially adapted for use in burning slack or pulverized coal, by means of which explosions are prevented from taking place within. the stove or within the flues, the explosive gases being carried off without accumulating due to the first firing of the coal or slack. H

A further object of the present invention is the provision of a novel form of grate which is constructed especially for burning coal dust or slack without the attendant eX- plosions, the same being provided with a damper whereby the regulation of the draft therethrough may be readily controlled.

with the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

In the drawings Figure 1 is a sectional view through a stove embodying the present invention. Fig. 2 is a top plan view of the grate minus the stack. Fig. 3 is a plan view of a portion of one section of the grate with a vertical central section through the stack, the damper being illustrated in full lines as closed and dotted lines as open.

Referring to the drawings, the numeral 1 designates the stove which in the present instance is shown as of the egg style or type, the same being provided with the an nular shoulder or rim 2 about the opening 3 which provides means for communication between the ash pit 4 and the combustion chamber 5 of the stove. The present grate 6 is composed of two sections 7, which when assembled form a dome, as clearly illustrated in Fig. 1, the said sections being held together by means of the apertured lugs 8-8 and 10 for the reception of the respective rivets or stove bolts 9 and 11. The elongated slots 12 are provided in the curved Specification of Letters Patent.

Patented Feb. 23, 1915.

. Application filed January 17.1914; sriiino. slat/52.

portion of the grate and provide a means to permitthe ashes to fall into the ash pit and also to permit the desired free introduction or circulationof the air to assist in the combustion of the coal within the chamber 5. Apertures l lare formed in the fiat portion 13 of thegrate, as clearly illustrated, while formed integral with and projecting eccentrically of the flat portion, is a sleeve or thimble 15 about the central air directing aperture 16 of; the grate sections.

,In order to provide a means for carrying the .air outwardly through the'opening 16. and to. create a draft through the body of the fuel which ordinarily assumes level indi-' cated' by dotted lines in Fig.1, afiue. 19 is provided which is a cylindrical member having diametrically disposed recesses 18 for fitting upon the lugs 17 formed integral with the grate. Thus the flue 19 is properly positioned in place and held against turning by means of the lugs 17. Through the body of the flue 19 are provided a plurality of air inlet openings 20 which permit any surplus gas to be drawn therein due to the passage of gas or air upwardly from the opening 16 through the fine 19 and out of the upper open end thereof. In order to regulate the fiow of air therethrough, a damper 21 is mounted in the flue 19 and is readily operable from within the stove or exteriorly as may be desired.

As the upper end of the flue 19 is above the fuel surface it is evident that any gas accumulated thereabove due to the passage of air through the flue will be commingled with the air and be carried out of the main flue of the stove, thus preventing accumulation of explosive gases above the coal or slack that tends when ignited to expand to such a degree as to cause an undesirable noise and at the same time blow soot out of the chimney or fine throughout the heating system.

It has been found when the present grate is properly applied within stoves of the egg or other type, that pulverized coal, dust or slack may be burnt economically and without the attendant accumulation of gases due to the rapid firing thereof, it be ing a known fact that when the dust is thrown upon a bed of hot coal that the gas is driven 01f the upper surface without being ignited and therefore will accumulate to a great degree within the upper portion of the combustion chamber of the stove. It is for that reason that the flue 19 has been designed and it has been found in practice that the same assists in the proper combustion of the coal dust or slack and prevents the accumulation of explosive gases above the surface of the coal inasmuch as the proper draft is created therethrough to insure the proper delivery of the explosive gases out of the flue and chimney.

: A hinged section or door 22 with elongated slots 12 is provided in one section of the grate, so that clinkers may be removed and delivered into the ash pit.

What is claimed is:

1. A stove, including an ash pit, a combustion chamber in communication therewith, a grate at the junction between the ash pit and the combustion chamber and provided with a central flue opening, a cylindrical flue open at both ends surrounding said opening and projecting-upwardly from the grate, whereby a current of air is supplied above the upper surface of the fuel to carry the accumulation of explosive gases thereaway from, and a damper mounted in said flue adjacent its upper end for controlling the volume of air passing therethrough.

"2. A stove having a domed grate provided with a central draft aperture, a thimble formed upon the upper surface of the grate around the aperture, a cylindrical flue open at both ends and perforated interme diate of its ends fitting Within the thimble and adapted to project centrally of the fuel body Within the stove, and a damper above the perforations for controlling the passage of air through the flue.

In testimony that I claim the foregoing as my own, I have hereto afiixed my signature in the presence of witnesses.

WILLIAM F. STARK.

Vitnesses O'rIs VVILsON SNYDER, JAMES BURSON, J. M. CHRITTON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

